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- Title
Broadband Asymmetric Light Transport in Compact Lithium Niobate Waveguides.
- Authors
Wu, Shengjie; Song, Wange; Sun, Jiacheng; Lin, Zhiyuan; Xin, Haoran; Zhu, Shining; Li, Tao
- Abstract
Asymmetric on‐chip light transport is important but always challenging for photonic integrations. Although it has been recently implemented by adiabatically encircling the exceptional points in a non‐Hermitian system, these approaches are fundamentally restricted to the adiabatic condition that brings disadvantages of low transmission efficiency and large device footprint. Here, it is proposed to realize a broadband asymmetric light transport in compact non‐Hermitian coupled waveguides on the lithium niobate‐on‐insulator (LNOI) platform. The asymmetric function is fulfilled by a particular mode selection in a loss‐controlled LNOI waveguide triplet, where a lossless zero mode plays a crucial role. Moreover, the shortcut to adiabaticity is applied to speed up the light evolution and shorten the device length. The approach works out a new strategy to establish an asymmetric light transport in a compact form, indicating further new on‐chip light manipulations in this promising LNOI photonic platform.
- Subjects
LITHIUM niobate; SPEED of light; WAVEGUIDES
- Publication
Laser & Photonics Reviews, 2023, Vol 17, Issue 8, p1
- ISSN
1863-8880
- Publication type
Article
- DOI
10.1002/lpor.202300306